Superpartners in String Theory

String theory’s concept of supersymmetry is a fancy way of saying that each particle has a related particle called a superpartner. Keeping track of the names of these superpartners can be tricky, so here are the rules in a nutshell.

The superpartner of a fermion begins with an s, so the superpartner of an electron is the selectron and the superpartner of the quark is the squark.

The superpartner of a boson ends in –ino, so the superpartner of a photon is the photino and of the graviton is the gravitino.

Use the following table to see some examples of the superpartner names.